Blackcat Adjustable LED Red Dot Sight Set Platform_AEG & GBB is best upgrade stock for

is best upgrade stock for AR style Rifle

Amoeba (ARES) M4 CG-002 Pistol AEG (Black)

but PDI did it for high end airsfters

VFC HK417 Battle Grip for Umarex / VFC HK417 AEG Series

Blackcat Adjustable LED Red Dot Sight Set Platform_AEG & GBB is best upgrade stock forBlackcat Adjustable LED Red Dot Sight Set (Black) Micro pistol size Red Dot Sight Metal Constructed Adjustable Red Illuminated Dot 5 Levels Dot Brightness Control on each illuminate color Buttons on the Left & right side for adjust the brightness Include 20mm Rail Mounts With Rubber Protective Lens Cover Operating by CR2032 Battery x 1 (Battery Not Include) Come With Hard Case